{
  "manageEntity": {
    "action": "Save",
    "entityId": "68943400",
    "entityType": "Track",
    "nonce": "0x7fd6bd52a151114ff2057b82c4171a52006954a7371f96775d70b6324d0b3d4e",
    "signature": "0xc3eda8be7829e045d1bb0e86d36973d49b97c2335e2b3e1e203151e5658cf23224fe13f83c786668518ed8ceab36b104d4482fbb51afe77ad37ca4a0f911f6e41c",
    "signer": "0xF9e681F290cD135E7F24F5db3ebbee5Fd1Fcf84f",
    "userId": "344863252"
  }
}