{
  "manageEntity": {
    "action": "Save",
    "entityId": "386833",
    "entityType": "Track",
    "nonce": "0xb9283f8a975dca4ee2807514c436c72079252570d83738bd4699bc6a6affc5e6",
    "signature": "0xae912e740a7bfd0276e3bbdb257e88e3cc9070019d11f5c715e9820c9b12d2697ba962fb03749aa98dfa74cab2820ca08eecb2928de34b0142dc844300a65c3a1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}