{
  "manageEntity": {
    "action": "Save",
    "entityId": "2109197223",
    "entityType": "Track",
    "nonce": "0x1e9d2a1346cf9ee87861914ffc7d6ba7a687881bc5850d63e692be142df2b436",
    "signature": "0xb763df40fe46eac588933fad6085260301614ee3ddd662df40505df751e5b8546d87f476ed1f0e20571fec7e6517fcfd4753b293b64299081d25e6a294c2dbf71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}