{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390804",
    "entityType": "User",
    "nonce": "0xd478c31abcee8fc617e81723873ac56f38464ba02c62ed8ad38aa193a3f8e2de",
    "signature": "0xd91d0cfab334a4c5dc8a48c38e933a8dac99b3358e6d703b67e4cc0e3aa0d0af75e651d85fe01248d554d1f5017c58af81d34692e1ecfbacb945f299ba316aa31c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}