{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75120",
    "entityType": "User",
    "nonce": "0xd21bd922aaed47548e14a6bc4ad19862339f1f1661c5d4f15c57adf17857c083",
    "signature": "0x6ff99fe4dbb65adcfcfe3aed640aa07ff509257b236c3bb3a80bd551f8a367da443b5e3e3f37e4b996cbcdfa70855b8f1ce0ba664cbf82f6d775e6e18927a57b1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}