{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "213441",
    "entityType": "User",
    "nonce": "0x0865ee598355413c8f20ca827e9a511da2b53f648ecfd7c2a254f87d9b32eadc",
    "signature": "0x89e305fe4f3b5750f4d5b1309d554c5de13a1475fc790fc6dda44c1c66edf68a1541cc925fd66bbb0522f7309be45a52ea47f8dd3107b15ff42e51568a46c02b1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}