{
  "manageEntity": {
    "action": "Save",
    "entityId": "585533498",
    "entityType": "Track",
    "nonce": "0x5aa356d0329a1cd96414ce11b28e0b7e798c6feee9404ad5aa449e9959b36be1",
    "signature": "0x0a0149b45356c308c4e30f36fb1f026b803b54b321252b45fddd5ef0be8e01a23e13e8fcb7e58831b19ba7f43bcd9aae0f1d1863efd1bbae0da62205a6306cab1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}