{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327998499",
    "entityType": "Track",
    "nonce": "0x783ad2ab09ac7cf06583c8963516ca4328fe482a468bdba81162b0e1a657a70d",
    "signature": "0x73a76cbf93b0cfef27587a1909494891335899b0c11e5825d789449bf2e4ca737db694c5a637867dbce8ccf03c69784538b7154bd428191c8eb19fb932a732611b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}