{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x781b61149eb4f311410a2c1b8b10f5de26e09d06dcd5941fbc47c2d409c6e19f",
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    "signer": "0xB1bdf4a1F5A8736A37D699426bA7dDe0aCDcdB58",
    "userId": "753535412"
  }
}