{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359260913",
    "entityType": "Track",
    "nonce": "0x6705c2802d205e835a2102b5cc9389997cd9eae134d548be8dca1c789c7ce493",
    "signature": "0xa73a360e1806ada439a3e72bac429dd110f5c1b0072302dfbe2dd6ad09e6e9ea0ff011665f0ddb99e3b673dd644a6f82a2345b4325421aade4d9f422c72f8cdb1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}