{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x89ba1973972e417ca0f7166e7359b3c7f962756585b8e9f0240a82da3c88fffd",
    "signature": "0x9a3c871a94e2f29d3d0667922668de62087ed89c85b2c94fccb44b926cb2c6c8007de9ccba4d6c77dccb4d57f2c888cc32db337a059f38dbac38a69e795dae801b",
    "signer": "0xFff22491d04e243D3932ffdB64992853Df881986",
    "userId": "935333912"
  }
}