{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0xbae1684836af6b8d5d702765f6b2cb76d0f0b32bc5828d3eb702380a9a74b0e7",
    "signature": "0x04f8e0484062ec2722d2c6c2ebe4a53eb959cf01263bfbee59a6fdc16937391907222fe1d428178f1e3f88729cc78a659ab65ca462f3f4ef3f7ce27df1e4a5721c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}