{
  "manageEntity": {
    "action": "Save",
    "entityId": "571447922",
    "entityType": "Track",
    "nonce": "0x03419822b77b6bdddf4cbe2b692e635b9ac1228ca520b630b4148786e9d02223",
    "signature": "0x5a5595365207baab0a767c3eb37377942f13735936eab58cec13c183e830e7e102ff6effd0a767e4ed98de7f5a4fec363db3742059a9e5150a5d27575a5236801b",
    "signer": "0x4fC400f8752FF4E4A86850cD9e147Ed6F337B7E1",
    "userId": "610472601"
  }
}