{
  "manageEntity": {
    "action": "Save",
    "entityId": "972587859",
    "entityType": "Track",
    "nonce": "0x7211aa1dca0df6e4c4d8f78c1617dc168baba8cd49d804bf0ea91f3bf73d731a",
    "signature": "0xd9405ef65e0e7b8a67c7362245009b34ea59d1588db53302db04dcf0c3f7daea4737ecd5b65ed2b7291bb5351d1a7412a745c1d5581b7fa58ab4aece315f37361c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}