{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x49b49a06d510c226ac309498f4e18dc0a20ef3f7b439653d8e27e8da520dbb14",
    "signature": "0xf73860f6d942d41aa884a73737057f608bc260a0bdc4f0c4e6d3c048c2c6f1e93bb838bf8f524d7ac3d8be2dbc0a2eb8567c9fdecdabb52f6e57d16b3959d1891c",
    "signer": "0x57E607CA5C91D00d86142931D0381Ec60C468871",
    "userId": "738717867"
  }
}