{
  "manageEntity": {
    "action": "Save",
    "entityId": "638239656",
    "entityType": "Track",
    "nonce": "0xbd3b1526c98432bd2723f88d94c5dfb76c0b6298668e6ab9c75f870dabdad56a",
    "signature": "0xe113684f9e90efed593bb8d02264f3b9e0d2384ae2b43cf92a44a83a18483c445ab7d31681551b51bd037356edc84af0c4427f9eedce9dac3cf93e7a24bded261b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}