{
  "manageEntity": {
    "action": "Save",
    "entityId": "394023",
    "entityType": "Track",
    "nonce": "0x44a86f8186ea28072a2f99bc97ff1097dafc0054d9c4c67024e189e5e845907b",
    "signature": "0x975a4de9cfd20cf5621315b12c503e412fac27f0cad0bc5847558fd79ab38e7b32460c28194818e109f00c8400fd94f72f2c57b2b2f1a5441e706da81298006a1c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}