{
  "manageEntity": {
    "action": "Save",
    "entityId": "299841646",
    "entityType": "Track",
    "nonce": "0xa6656f761d897df2b62a5225f37aa29fc118fb1a8b04e51f97b94983f6847f25",
    "signature": "0xa72a628d68c053b571f614aed7a5329862535706eaeaf5485896c25badf4dcde7167496a310843817c6749684c680b73674325df2c9add3620cbbf647e179ffe1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}