{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224821603",
    "entityType": "Track",
    "nonce": "0x5ede00fe4cb23895524f333aa5eca77d05be8678b306e7a708ad2dce9da234ea",
    "signature": "0x1161a275a4890c48f01fba223b5de1e980e556f3f97ac3fa00c4e8490149777e349fa940aeb916eefe7046b112252a2b5560e1569c67eb3157bb978a73e0c7261c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}