{
  "manageEntity": {
    "action": "Save",
    "entityId": "133410349",
    "entityType": "Track",
    "nonce": "0xb8c8df07f319ea3a3270d6e5daf273cde15b1ad80e8e41cdd9889c1e3e1cccf9",
    "signature": "0xb3e0b962727f0c4a56f3aa6a1d40f5f8e18aa8da1fd87682d3657daf331b0c1d50b01153e1da3ad36974ffb0a6f975298cd912f4966d9c1e756da4eeb4e7fd291b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}