{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "324457434",
    "entityType": "User",
    "nonce": "0x993232c7fae2dfb36a234a85261ed2198018d81f3b137384bf5fbc5578bc37e1",
    "signature": "0x4251f552969708f487fda1756c1c68be2d35e0ab9d77f5c0a42a5dbdab76aed70bcd92f16db2779520f2ac03809500d548dbe1d42c8836c9b02ea43f65f5b7f41c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}