{
  "manageEntity": {
    "action": "Save",
    "entityId": "1884529827",
    "entityType": "Track",
    "nonce": "0x9acd4f184673c6a9d1dfa6e1092d384fba1f8ac75e52a42e54b48805eac75afa",
    "signature": "0x7fd65cbede389d5c57f0e74ad81f94105ea3a39871a9fe44f8b634c9f7be21ea28c53312d49a5d250f31773c476a9d0fed168254733715743657c840ca610b271c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}