{
  "manageEntity": {
    "action": "Save",
    "entityId": "972239860",
    "entityType": "Track",
    "nonce": "0xa0e2c0fd49f1554bdf8f2399f098aff5638c4ac2c298a19aa16e3db5143b35bd",
    "signature": "0x71168c1d79b8fe012dc0b2735e345006d17fdf66e05cec29e33b213d6a0abb4c2f50961884e9c745200d48206f94c3d0c5cd3913f06256346e569966a851a6311b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}