{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862446321",
    "entityType": "Track",
    "nonce": "0xaa5c8fe5579e7bde9d6fb0c6592effe23b3367f41ac1e38a770f6f4afd2181de",
    "signature": "0x0bd2cf18039bcf153b04e66c4f5e0a5ac0faa6150a50ecf96526287277e6ee4d4acab9f204207af3f28b43194ae36654d6432af9612d5fa57978be0a6e0769cf1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}