{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021029",
    "entityType": "Track",
    "nonce": "0xbbaf3db9f99971d5fff8772f540d7804f89aa48f5ba8ac03f51fbbb6dac1cfb0",
    "signature": "0x477fa28f066f3a3f1efe4956e2665698ea2c29ba6d7bc9ca59f9222af96f6ee7329606b463744a835f173e40635ce329a2f5ae49c873b4de4b4c45d4de4cf36a1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}