{
  "manageEntity": {
    "action": "Save",
    "entityId": "1243927969",
    "entityType": "Track",
    "nonce": "0x044ac5c31bbe747e5655f5cbe87ca408bdceaaa7d8738dfe463f20618b4ce89b",
    "signature": "0x6b9adee2bf0a3c9e9cf0f4341d0885126a73e89c1e718afbecb04e2680cfea4c4fd867c92f745fba906f55e9b5403b5164c9ff0cc004aa618493409c22b296e11c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}