{
  "manageEntity": {
    "action": "Save",
    "entityId": "39821480",
    "entityType": "Track",
    "nonce": "0x0dfdabca8572eeaacdede8149ad74283fb79a96143c7bf36fbbd322546e5ef58",
    "signature": "0x493bfcf297ea7989a3fa52a1875aa3eb42de576bf99f87d43349753175e30e3f2ff929a2983830a92e62dd0fb4cdcc0065036ca218ca4631f6eca7590f3e0c5f1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}