{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7301410ae55b0b157122bf8969b111098ab748cdc7a57112d58f8e2bb003760c",
    "signature": "0x010ef378378d74a4c11c12bbb6c4fd75a47683055ff5a149318d03593b05251e35e405a5d2fef62ac44eecee0ddf0e82b40fd1f3a27de818873cc1ed62507a281b",
    "signer": "0x4D8416579666049F9954c3E6d00b915098864132",
    "userId": "614957051"
  }
}