{
  "manageEntity": {
    "action": "Save",
    "entityId": "790604123",
    "entityType": "Track",
    "nonce": "0xcd68a082215173c9a16be4ff08d04c525fc6130a79bd1b9254539d04d9b7cbd7",
    "signature": "0xab112b7020c7ffb6e29031a7c7cc53973a7450373860190a25e2fa898da83ba05185ca7521e9185e626e79de52c1d6122834e16c37fe53cfd8d54f17f9962fe51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}