{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0xc23d965e1ffce68cf747842fc3fd1465afdb447863cacda057682d1f2f4d325b",
    "signature": "0x8ceb75fe3d3738e3bc5b4c3f5430c9c4f4f91a8d3a8aac65ce1184bf79c8423161c0d4ccc9b786588ecfa7cf8e240a2fc78561d08c1e1c9e2e652f9a834484551b",
    "signer": "0x9de29362DF595E6949CaA2820c5c28c3D6b0CEe1",
    "userId": "857551474"
  }
}