{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045654142",
    "entityType": "Track",
    "nonce": "0xb69cea4b35e00ad91d55dedbe7143c18d4cda652a98e076e13acbc545f6962f2",
    "signature": "0x37e93372fa269c9ddbd1a1fabd910d64242b221b76e1bd9f21d0ae082903834d15ec7efcbcbb37cbe5c101e4c3166747e5da9ca5b54f5ced35d4171b63d0c1751b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}