{
  "manageEntity": {
    "action": "Save",
    "entityId": "1296962789",
    "entityType": "Track",
    "nonce": "0x0a7e1c7081b645a118bedbac8c567ce9702eb9f52afc142a72e45cd201252078",
    "signature": "0x5623e322b533d0fe36a94be3e456f5b385df3ab804609028877ce848f255885025caba01cc1ba628c11f15a6d9c4e10bf15898e36caee381bc33232f3f76b72f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}