{
  "manageEntity": {
    "action": "Save",
    "entityId": "240308",
    "entityType": "Track",
    "nonce": "0x3c8fbb40af52a063a52f67a0bcbdacd040b8cb677d9b9395dc7c2b51abde1a4d",
    "signature": "0xc1ade6db942d4172af78b898cc91c3cc3bd3d05b8e55ca288eec1466405b4600272eba7d48f900694a5debf3eb2637e5bee7ef2420ba99ac7f92dc03887c477f1b",
    "signer": "0x62E1406ED2dD19703B8C2DA504d58707305282F3",
    "userId": "674829015"
  }
}