{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244393010",
    "entityType": "Track",
    "nonce": "0xb95884c90e1ea9013c18d6fb5be856c5c237bb58a32eacf654f2e4da7d997d67",
    "signature": "0xfdefe4514b5773990a662462393892b7472bb8b55f55eb0b822d9a4dd97544bd0ca5bd0ed446e04be6c4f51c9fdead4a3593ad6d5949e09720ac1464d21bc9441c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}