{
  "manageEntity": {
    "action": "Save",
    "entityId": "775092558",
    "entityType": "Track",
    "nonce": "0x15c8883a3bd9c4bec061015f6aab4679c0e81f4e27a3c4c3821a09b95d32d43a",
    "signature": "0xdb67c8e307878b45f33c2049f0ee73d34c4a5e395266064e921fda306febca736773dbd1e46b7a355b7298a116281e918f17fde64c895b36c368c0bcabdf346f1c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}