{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0e15d95e9de990333aa18a2afd45b4dadd4e9a927f3a352bf7331fdaac4f04b1",
    "signature": "0xd34e50bf772f40728fb6c9e7d5700bde95aa5391cc0d23f1695bc1047ceda3f51624f1abed81e70ab4fb8139febcd521e723847df2e96457abf5e37651665de91c",
    "signer": "0xa4b0C004E92e9260e9BE06181699D14C2B36275c",
    "userId": "273477320"
  }
}