{
  "manageEntity": {
    "action": "Save",
    "entityId": "485688503",
    "entityType": "Track",
    "nonce": "1791828642944623535",
    "signature": "0xde62eed94b7bd34dbd5716859787f3d346e6063dec23d0267a0c5712ceb72ea711690eb8e996d6eff379574e6eeb9c91742748d79c6d54dd22ec2b5cf8538c151b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}