{
  "manageEntity": {
    "action": "Save",
    "entityId": "1784827779",
    "entityType": "Track",
    "nonce": "0x242b960198f82d96047fc2d61d32d08ab60d39c6cffefffc57212317f518c08d",
    "signature": "0x5a70823d3d39eebcc7a5afe6c21f8a36d583b8bd309da1de80c4a60f54d1c5a8629f4f4fa08800d6a5f9b7b3e32555545090e7f2dbdcc58e19d3a2605b6b89721b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}