{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x305f3dcbd8e580efebfb2db755766e6039bb0b64790b1061843e7d5c9a6c14a6",
    "signature": "0xc562ae78ec2a941de3acec12b609c9b360c2a42bbf01ada5a4eed2db1d3e27fc5ccca4817ac0b95b2684b1105e388ac705c6faaa04ebfb877fe60d04fcb4c8701c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}