{
  "manageEntity": {
    "action": "Save",
    "entityId": "633704",
    "entityType": "Track",
    "nonce": "0x06bdca240339444203355e606562a5ef5f90fa567736e3db0dc75cdd8f4518fc",
    "signature": "0xb7ca017f2d09aa4034172f18a8de715cba4bfda186ac50e4bc394c8685ad82a3051597f6fe1f0667d581468543598193a42b56d5c7b70a071838b8b79c3e6d371b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}