{
  "manageEntity": {
    "action": "Save",
    "entityId": "168658668",
    "entityType": "Track",
    "nonce": "0x14e6a69f2f727cbfe91fcdef609843b0c21ff06bf9c4bad9556fb21a6b457339",
    "signature": "0x1206c80fe6a8b15018b9070bc31fc15f74548184f4aa1c2c187cb70281f38b9255c7eb970bf08dca3116f788ea332814f0ec677d3218b529d0db5c293777d3c91c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}