{
  "manageEntity": {
    "action": "Save",
    "entityId": "496691",
    "entityType": "Track",
    "nonce": "0x41f74ac2cfad30ce2c73dddaa342c63606de1d4d248e1fa2729db2541efc7b56",
    "signature": "0xdb8aac8cfe15c311931c64722a4e37036551b004632508218ef5aed5e79355bc75646a44e6bc783dc0be5f9bf88992cae27baa34996c41428eb5d5b1c6d3de601b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}