{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0xc3c6ff6d8f520303707f5d6517e78356ae34d89efe7558dcf0b04b53d6197047",
    "signature": "0xc91619d6e750a464c83d68117be14b78ee4a94150e360b08e7ce59f27c6cd5e1697e4d3a499101768658c49565df6bea34f5e884442cd0fcaa28a583482556751b",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}