{
  "manageEntity": {
    "action": "Save",
    "entityId": "596336",
    "entityType": "Track",
    "nonce": "0x629d4be060f76b9349d648cf3ceeed20c60963a6baac461abf30a3997d141d3f",
    "signature": "0x3906a15042ab74206bf8af0be172f0dbb8a0d6b1a47386a6d9a052bd4b68702844967e424555f118929420162c27b73d8d12365688b6025b1c596a401d0350951b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}