{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174563847",
    "entityType": "Track",
    "nonce": "0x29c0ce8bc4b8f5efd9738d5b6191770393cfffc40fb56e36efd495382d3cbdbf",
    "signature": "0xed82dc3c44a9f3c27ad1d45399b1ef1f2b143ed6f80c59d88bdba5875d562e683a3d0c9294d6487e25446b723c16dad46dd3c1a1ea4adb16df3c0cc88d61b1b71c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}