{
  "manageEntity": {
    "action": "Save",
    "entityId": "1939661197",
    "entityType": "Track",
    "nonce": "0x58d6300a11eff722a699ff524178e4ce81d101ba5101a686a1226677430b3cf7",
    "signature": "0xf08e45d2bec35b053c7d2156fd4b0767160e596efe71fec3d49b2d4b46d72c521b30bb43c9ce3b361e3e467749bc9a899ae7827cd55edcdf053f277f27a1ee3e1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}