{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520958130",
    "entityType": "User",
    "nonce": "0x4975c6f16903e59a635a23f8298877638afe73097d407a7970ce59890c7f6456",
    "signature": "0x49b3787803ff535a23614eda7892842a00827ee9726da64de89450651af3ed1134e2c17ee0a0c4120a1ab11283dea1212fa3e6a2c7176a202ca555f81953224a1b",
    "signer": "0x6015AC6ad37b0328C10a529E70348751FE8ffF41",
    "userId": "176201"
  }
}