{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003707995",
    "entityType": "Track",
    "nonce": "0x05fa86e51c2c5365c22548441251a46635c30df4a47ee06866f66d66bf0e7df9",
    "signature": "0x45653ee14c9c8f5da59933a5898f1664668706d4aee3aae16d700502c63d79426d0a68d2232c1de515e4d274907efd9f0012313265da72219f9a25bf6a7381f41c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}