{
  "manageEntity": {
    "action": "Save",
    "entityId": "775239457",
    "entityType": "Track",
    "nonce": "0x237aedcf3b12e60c138a05c7ef77e9c0ee8e743e6159b4605fdde6027f5c001f",
    "signature": "0x788c6e1be986ac64e5822c770ce9927c756240912e5912172399fe83ca91e1912594a7a503439497a67f4dac9e207175566430529e1a3ec4e34035305b28a4d11b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}