{
  "manageEntity": {
    "action": "Save",
    "entityId": "562996099",
    "entityType": "Track",
    "nonce": "0xa407dbe9ed844e3469c86a96889e1c84d021b36bde41c671d3822272e117ee65",
    "signature": "0x3465a5eb99269d6bc95155b45923fac8f92510ef7cd1189968a73f8a6af8969f6225a760e9a1544a51ec1a3e51e0d73f25c7e3221a87fc1e1216a6a5ac13f55a1c",
    "signer": "0xb0bc7585AC84F169814851A3C22d8d92D133337F",
    "userId": "267657235"
  }
}