{
  "manageEntity": {
    "action": "Save",
    "entityId": "1857468905",
    "entityType": "Track",
    "nonce": "0x7211ff3c04b2ed5279b4c7066720f22ee0b874c4eac5a44afd436bea9c9afd8d",
    "signature": "0x07253b26b5f22f4294f14fe380c8b94e58d3e0a9c379d1185da5db98e9bb1f0055633f50eb93a5b99fe17adaa72752563170fd12039ae09ffa24cb554f749a4a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}