{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x58dc2d8cf2fd456c85668ebcb1dfb6bc19bf8a654a034999a40dbac2f9f4e81a",
    "signature": "0x1cdabf2b6100e5717f44365f668ac8df359d45a3edf4ccb1a02ee53f4e45c18173cd1b325811db45007f4bfdaeb3754bc649a69256bc638428bba66365fd53781b",
    "signer": "0x52EFa2c90F70f3d2ee87104188757d08c8E2b855",
    "userId": "137533742"
  }
}