{
  "manageEntity": {
    "action": "Save",
    "entityId": "314452390",
    "entityType": "Track",
    "nonce": "0x5729f1d7ffa3108b32b9b5d8aede0e622ad2851e3a86df2492de61543cc6f028",
    "signature": "0x6efca32fe5eac089248d5ce2459f9c758bb71a9c0718b4bb8f7229b7696c63007c2c63a5dcbbd84ed9081b0acd9273b0f5268970903fc2bd9bf43a06cddf84f01b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}