{
  "manageEntity": {
    "action": "Save",
    "entityId": "311328301",
    "entityType": "Track",
    "nonce": "0xa0856ceae24b54db1725463dd6176161c031458db6afb67c758f6bea96b5d702",
    "signature": "0xf029d0816d1e5000de3b3870b6ab78fa6157d4d569912de1a6888bf53abd7cad2e3209b2b2c728bc1fbbbe9369e1c02fe93924ac63ef50d303c6df85457e1cfc1c",
    "signer": "0x3EC8c7F4Fec5D21Be724bB4D43502e44e018690F",
    "userId": "53828"
  }
}