{
  "manageEntity": {
    "action": "Save",
    "entityId": "81506978",
    "entityType": "Track",
    "nonce": "0x61bcf40bc65d8a07feb81926cf166066430e816c46232fdf8604784b3411b584",
    "signature": "0x494a39bac81efec2da3de79a6697537aabd232a076577e0533de6f72754911ed75ccf5ef150d77c7505032963778c9bacf9c465f0382bec38b30bd3aea1995b61c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}