{
  "manageEntity": {
    "action": "Save",
    "entityId": "244412",
    "entityType": "Track",
    "nonce": "0x78c08efb173724493b6f1fa46f9b5fe64a92b119bd794f5c01ab7cccb17a60c4",
    "signature": "0x75ac410a45ee98ca22543d83433d8874149f24754ac93c3b1eedacc0ce69fb5909404fa18f0840c09dc82f84e9916cb73bb5e23e697d174e9ed64bb589cb7a661c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}