{
  "manageEntity": {
    "action": "Save",
    "entityId": "1567096619",
    "entityType": "Track",
    "nonce": "0x3887d689045516dfdd01aba103069c95996eb8ff5723740e91ff77bb410a9c68",
    "signature": "0xfaaa5fd83e661f881af534455e21981490aeb2b374fc18497ad332802c434aaf32a12b4a2e7b67d0fc0f3377ecc484d39f342113312833e5ef7e7f5d695c9bf41b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}