{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089330",
    "entityType": "Track",
    "nonce": "0x9b87a1be3264024890d0c0b6bba93ee7c6d97f15c4bdf6c3f55be188b1bdf06c",
    "signature": "0xe7ad0db0407a9b5c08b16c9fe442c9913abfc4b1478c49e84e75cd113ea07d2107265e7bb8a88985c7731bd06d4e0e8ffd6ef772560fca519d4bc060a1e1c9071c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}