{
  "manageEntity": {
    "action": "Save",
    "entityId": "359762347",
    "entityType": "Track",
    "nonce": "0x9244cc424d363daa693cb761e812507792149043a5723e22f138b06059ae1af5",
    "signature": "0xd4d5a7529060b5f0200f59e5b1d7d4c1aed45b92418a246ab80ea48a3f7bde937a8018c9b2e4cb0b2f6b300765f88bf1e025b2afbb56a1725e574dfeec419e6d1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}