{
  "manageEntity": {
    "action": "Save",
    "entityId": "31866",
    "entityType": "Track",
    "nonce": "0x7b65953153001a9928359cb46249a510fa671bf58f364ebf69e3bc64e11df01f",
    "signature": "0x25a9f5b57f8f51cf7f73d1c84086fd6b503e1ade5ed079b9d1b2bc6c80f60b0962d4619af10fc675275a88ef4c8530097fea76cdee316b0be31f2622fa9d82e51b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}