{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "964257878",
    "entityType": "User",
    "nonce": "0x89d61374f9ca7b293db943e51a428659bb79c5513b6aa7d9796612d4ce80dca4",
    "signature": "0x6d92e7cfc5244e922afa0f0aeff399767f1d7d02b4fa0fd3d29f24d6f2a406586041da523827980dd106d67e92c27189eb4a004b657cca4e71efad599bede3491b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}