{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "146510",
    "entityType": "User",
    "nonce": "0x81020a8a525144424500a688c1b08d55c7c1f60c69cc38ef5b3bb37a4baa757a",
    "signature": "0x8a2b0dce7f3e16e706f06f9758680fe2e0ac5e9995b8bf7b45095bee451ab4b56f8d3983bf90d36aed81a08c9b2cdac9aad56478a0f9caa292acfa9a991f3e461b",
    "signer": "0x548E1c3e772F1853e347739D56c373D3E0E4A50d",
    "userId": "508662104"
  }
}