{
  "manageEntity": {
    "action": "Save",
    "entityId": "286414633",
    "entityType": "Track",
    "nonce": "0x22b0f0f770278b863bc9df2bda6b99a7a5acbe1fde643f7742151d4ea7d5665c",
    "signature": "0x41ea5ec1a09ef2eecd5f81a656336ee249e20bdb1453246eb9fd91b2aa56c0854aac14d851321e2fdb90652b75b9d4872eab526cae06e20be063154f978c6c2a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}