{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0xfa3f5cbc7ec27a8d75bbf02972b5acd7313928e2fd41c42598ebebc2e1d0e10a",
    "signature": "0x3bc6758a27346bdb3ef820670a60e8031899813c7dc20cbfc96b20a52e5214b84befe85ba32f6f1f90b86162b3d073f14962678fada0a09e672475d38a327e711c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}