{
  "manageEntity": {
    "action": "Save",
    "entityId": "2107134947",
    "entityType": "Track",
    "nonce": "0xffe0e8eae7947acd48f1b78bc1d7c5694315e4b5865b08b5869789b2d390d9c5",
    "signature": "0xd9c13bc7dda10d553012372fb03f995082c575497eb6d9f86c1d691ee2bea3a4740a4cc6c3f18109c3da54e517288b167c691c695435309454cf3deda3431c4f1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}