{
  "manageEntity": {
    "action": "Save",
    "entityId": "2136502121",
    "entityType": "Track",
    "nonce": "0xcf6c6d88bfd16e68db031f076505b9a3e3f6b5c07a9441b237a11b57625ff888",
    "signature": "0x8c54a80914bdc975cb3e1dff8f93fd93388dfacb69d643eb5a15cb254be44283686f5ce979a6370025ddad00fc32f79294a73357d23e45d39a5f4413b666b4e01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}