{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918729977",
    "entityType": "Track",
    "nonce": "0x38060c4587fdabb4b554c8dbaef2d30ce978d1329a30b319679447d648088789",
    "signature": "0xdd988dd4598bd810b3073df07b044cffb9b817e2886d8d5605c924460d54645f470077aac8072381aaa87151f26236d2a9c10800d7220a9f8fbd3403ea8a66991c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}