{
  "manageEntity": {
    "action": "Save",
    "entityId": "2015848527",
    "entityType": "Track",
    "nonce": "0xe134bb6496ce2d8c4f9e59603c5294b04a343ac60e76274ff6071ce1ae0e0c8d",
    "signature": "0xcd2a28be8d2f841a12d1230d2718685cafa1ae1620fd100e6e3371edae98991f7d74d19ba05b63e43b89bedc2656f7b49ccd555d8d90dea1048b42d5892b94491b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}