{
  "manageEntity": {
    "action": "Save",
    "entityId": "2074674267",
    "entityType": "Track",
    "nonce": "0xdf9e272012d4da0fa660b5ef6b9fcae58a3814cdd0000e7daabdb77d3d9f1015",
    "signature": "0x9d650d9ab7149879d0cc7e0ef8b6b23bde3649b9f8747a01e83db38c6e1588e01a5e1d3a511ced17800cf7517d99a5657e3b5deafe70fc6f5db52bb54539f9601b",
    "signer": "0xFeeaAD014F16Fd21238D7D4522bcc8B0148cd3e8",
    "userId": "948228891"
  }
}