{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x89d9bb61a0452da989b97403e302bd3b85dec5de0e6d7681c0cbbfdff2a945d8",
    "signature": "0x49523cdd1eb7713c52d1d48c55f6c02e579a67bfe9d4917e271d5c288a9e0d8f10fd4b47b6174e659318c86cb05403c30bb44a076d08f6aaae8a5ed757305b751b",
    "signer": "0x20a821B898F6Cb6BB0E5FB2460eD4225B40Bd68D",
    "userId": "198400104"
  }
}