{
  "manageEntity": {
    "action": "Save",
    "entityId": "406335",
    "entityType": "Track",
    "nonce": "0x44c82126f3fe7fa61decc758caffcd0de9297300f0712f7899ac52d0e247b6b1",
    "signature": "0xfae8d70f2a4cc5ff26c011fd86d67bf67e3cb95256d4261aa92966e9e8899b7423fadc8ba26108aef77a5c4ccdc52419b5b1115e00143173871dbd1ad214028a1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}