{
  "manageEntity": {
    "action": "Save",
    "entityId": "324660302",
    "entityType": "Track",
    "nonce": "0x5dda242b8cb95ec3bc39c10759f9359584c257f5c195fb74af14ef1fe752bcd1",
    "signature": "0xa50252035c6d3d4ffb74b67b8a0177156a30739834074d481ff11d7f54a9227d2da84497bdd147a6e0fec88a5da1fb74e1812d65ec5fb1c8f78583604ffbcae11b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}