{
  "manageEntity": {
    "action": "Save",
    "entityId": "386406032",
    "entityType": "Track",
    "nonce": "0x1f621d53020cfb3789642676a027afc0d5c118e12bf599162ffb1d00562be70f",
    "signature": "0x0ca35b25395f922d8a4d6478ac73ddbd7e034abbfec7907f84de04b2982ba57450265a9b2a33e033c0db52d4f98efb60607475b9b56e116345474fed979eedd61c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}