{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356707217",
    "entityType": "Track",
    "nonce": "0x4b16959b85f3bf4cabbba63b97196b751771066fb11a84f4ebaf2fe6febff601",
    "signature": "0xb1bc3e46081413fc3c958ede27845cd89178db95a7bc0f6c839c92b9bee45e7a32d6ebf63626b69fee6f74f7e21eaf3874c2be27dc10c0d5fc12cd33ecbaea621c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}