{
  "manageEntity": {
    "action": "Save",
    "entityId": "328041",
    "entityType": "Track",
    "nonce": "0x8b9ae41978c31202ad1a231e86d4d5000352f9d6271a0e621a5adfa6dba9afca",
    "signature": "0x3f8683de2847fd82994972e338874c011538d7b495929ed1b4d00bd696c7a12c244637f338a3692c91eb67c8602bbe623cde8d6ede1cff26720e48682eabcb931b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}