{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252324993",
    "entityType": "Track",
    "nonce": "0xf87319cc014fc20ba27f8d4f2d4580a233b3c891301244f7ed0ef2f82a6e82a3",
    "signature": "0x2d9d19929a9628eff43b936cd62fb50011b59496c089e88aefd2c3cda9ad3b360a9a06154cfa42fc96b14d56d7aa6097bc5091b4222145f68a503562e4a609111c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}