{
  "manageEntity": {
    "action": "Save",
    "entityId": "130403791",
    "entityType": "Track",
    "nonce": "0x5b3928befb7cc668e779e7dd3b99bc7879419dc41575f9a4c8ab61751b315c73",
    "signature": "0xe5e8b4c87ca4ff91e4941c9b93d3cec54cd2d3148b6f3c81435e7c896f1ca339438edc8233f74b36f1b5ca621f7ba7bfa251d1a223914c4296aed4a7e77254c41c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}