{
  "manageEntity": {
    "action": "Save",
    "entityId": "1864833369",
    "entityType": "Track",
    "nonce": "0xe8c381f278bc3a81eab87771cc219158feb96f8b407c04a9e59a6c57f1d5cb36",
    "signature": "0x88318d9e0b277e1a09ae6b4ef4c9e7c1c6c24c0150ce73c358837263ada35b0f13161da4d8bfa1a3266bbcc4ad43246a4bfa310bc15c06032618e79c818736591c",
    "signer": "0x22Fc85b6fce8CE12f05a05dF6894b4140b7e8bC7",
    "userId": "373394983"
  }
}