{
  "manageEntity": {
    "action": "Save",
    "entityId": "1653028711",
    "entityType": "Track",
    "nonce": "0x05a0c80f095e4d56597ec6bbed450c771437ebcc0b9be8d3b0dca9c4b0f019f4",
    "signature": "0x3395ee1cb824dd2e740d67c9b7cfafd31a3530c7be7235ecdf2e47965c94c6dd2a851b6e9c09cfb9bef86361adea0e677484a8ea60f8dc8aeaec129176f64fb31b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}