{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105815830",
    "entityType": "Track",
    "nonce": "0xfe1e8ceff5a1e30c6fa8ed2968afde1006f7bad644ca8c6229f109afdbe497ea",
    "signature": "0x6fd074414076cd6e03e48731430473896f95ce086c05018284bc516b64621b2d730b682e99c1e42765e760b6e3bf17560fdbfb489adefe5f6693e27fac5309041c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}