{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514675854",
    "entityType": "Track",
    "nonce": "0x38abf208e17b76a88b381c46fc689b9bceb5c30382b973e9ca9e669f353f6859",
    "signature": "0x7aa8c4b9422ba7b1ff686d09652f6245726429f21aac653b883466d34da6c2cd7fe42994d1093fb901b27562a8afdef53b0c32d52a1174f7381a25d7086efd6d1b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}