{
  "manageEntity": {
    "action": "Save",
    "entityId": "309477",
    "entityType": "Track",
    "nonce": "0x38b5203d9260bc8c7b6852eec1a2a309f72909ad1e90dfe9ad599195d6138d2f",
    "signature": "0x0c34c7834d14742f892a6c607fdbc384c9f16703b0cc1b2cdc1923d742667aab4018436d75373512898e7ad2b0cbd63a7ac6b8874c96838a02d439aba6a55e521b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}