{
  "manageEntity": {
    "action": "Save",
    "entityId": "920618058",
    "entityType": "Track",
    "nonce": "0xdf60d90831f1ecb98bb5cf3f5b89ce4c5e7e342ad474d523b4deacd724b84717",
    "signature": "0xbde1bc5cd6941cd297ca62eeac711b4f153c574bb52d9146e179df84e0e1f3ca649968cb0192c6a7f7c87a49f03a13307c46533620caaf481cd6e75a2194561c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}