{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037226069",
    "entityType": "Track",
    "nonce": "0x7388dce4435e86ec0b5d23c67da100bd8e55c30b1ec8f1d8f431b04c6cc3325b",
    "signature": "0x072d091dd903c4cd13d33d3fe6af0cef3c27774cd8d5aa3118a6d737606f1f687a633f4c9c6e7531af08fb1c6f6676b418252f055da93dd83c490173cbaa54b31c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}