{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341783938",
    "entityType": "Track",
    "nonce": "0x9407828ec8804d1debb35dcf7b43dc436e7e41673ed982517f42eb3d24238293",
    "signature": "0x4d14959423c2b48ba6393a6cdc449dc6851f75035075de9643f7eeba204d94a53826e764d68bf76cc1152dcfd2f0a640541267629bf398a2e9d7885c7af0fc181c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}