{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780305912",
    "entityType": "Track",
    "nonce": "0x074cb07289dadb02af000004b8a1732fcbe592ceea12af7b362fc97556e83385",
    "signature": "0x8646b40e92c58e111299eb342239d78a922804d720e92db9bd07400f2772d9495f9bd77c9bbe9c94850ad2e301cea9b0030c54b5b3e06eb4c0b25dcd0f1ad69b1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}