{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962760404",
    "entityType": "Track",
    "nonce": "0xe0ea034860a1275f447c3f008af40a063e2de44fa4742b749e9e942dca3ebe29",
    "signature": "0x372b921fdc08b0f141ac664b977b82f2c7b47cf1a5d4f877d512ae3264648d5a6628ffbe2061030cf14904629f29d5187148bc6415479c3011be5945dae6933d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}