{
  "manageEntity": {
    "action": "Save",
    "entityId": "527737412",
    "entityType": "Track",
    "nonce": "0xf3aaf7850eb755775939aee39e12dba7b6d9f296a9e1dd18881b51d782fab9ea",
    "signature": "0x5d073345f46c2f22103dedeb2f4fe3e7393d9bb25636885f5abc886b1af33c101550adecd9cae37551f514c3b57771311b1fa0edd0e0eb4ba5e3c0d010b880cd1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}