{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216634812",
    "entityType": "Track",
    "nonce": "0xea21bf687c0e0e050b156f150a3f638187a0242f903d01406e7e6cdfc3902fdd",
    "signature": "0xb6e08c5a2df80233ef7bb6341399fdfd0c2eb6446704c0a895dce86870e7c32b1097b6e808d7dcad2ae6e6bf34f6dabdccbf6168560ca0c642075d2be9fce6391c",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}