{
  "manageEntity": {
    "action": "Save",
    "entityId": "222462",
    "entityType": "Track",
    "nonce": "0x74ca730d15ce8b3534ac4725be13574800c6554cbb0e518e5dc43e5ed0f80ab3",
    "signature": "0xbbd281dbdaf19b8654e7a46b31ca246a81e240c744572daafe15a63da2c4738a3bddb869be2e59ec977b2d93658c959fb27e3045330c9cf703bb43df8e1bba171b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}