{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662435937",
    "entityType": "Track",
    "nonce": "0xa41af8e7b761c4c5ce17953af88aeb48458f51f25e0aef137c7fef55984f6fdd",
    "signature": "0x7b14798bede0ee5785dd6f172c7fcc6f6f0a3e188a0d43948dded76ad598b5466e704b193bf5ec2fb0290fac51f559cf646e753ecca57dd093d663a09d764c981b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}