{
  "manageEntity": {
    "action": "Save",
    "entityId": "172735415",
    "entityType": "Track",
    "nonce": "0x615dbced2be1fb3ef14bbd9a83e0c4bf9be231e0b8caf0dfb01c7027dd212f0a",
    "signature": "0xd731baa14b63b6be64c34f19924f7c1fbe2dd4787bfe3324de47870aebf1c5556612999c4f0a18d95ef83c41b77f987900ec444e191ae923180a9507deb10da41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}