{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "741893",
    "entityType": "User",
    "nonce": "0x5fda23e35bfabff6674e155a04c093133aaefebe1fcb28579271069a476be204",
    "signature": "0xf7c375afc0d89de79484b06040c83dbca74a8810c060e6eee36d34d6f382baa75776f08ebf6b1a1e08fe2e325d67a1682c3f172063f434384cb373e6b185004f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}