{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21b9dc84c5ae9588a9ff035c25757566044f11759e02f3c8b70f5a821527a5a3",
    "signature": "0xf56873aa93bbbd6bd741a37337ae4b77c0f5e0a3b6f3465bbad284aad16cb5006939a203414ee7408be0a1091e51828ff14703543c0f253cfd064a200792f8f21c",
    "signer": "0xF281FDbbcFC71CfaFce16d3A33e5abe3048C3C96",
    "userId": "305690953"
  }
}