{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116831463",
    "entityType": "Track",
    "nonce": "0x88e1694fbc1edd2a25defa7b7eadf2863ec0206a903cbac73993f868e2fc337a",
    "signature": "0x3c2168de5874f44faadec1d2ee7c51333a1876f0edc34b046333e00230112742761852613a33badcbc2ecc4cb8baa5b09ec2177a2b16e26c0f3488ff3e8ca67f1b",
    "signer": "0x697B9B9E4eD334E787D1C9b050bBd6A12bF84208",
    "userId": "20671471"
  }
}