{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "393869355",
    "entityType": "User",
    "nonce": "0x17068480e4f7540e2669223a981ba630642e9ca96ee9f7a1a5ec0d25104cde77",
    "signature": "0x5b724e7cb3e506ad923cb39553dd0439defd4d8d9f835c7af3d15c9448f0e86b5536b7c3709f0817b8c0fdb2cb43a6c247adba73200e24c906043df545008ba81b",
    "signer": "0xECa2bBF4a1e9021EB6333AE87f31121De2f54600",
    "userId": "197455"
  }
}