{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615702798",
    "entityType": "User",
    "nonce": "0x55c7b198a792b4a0023608bb60a63b0e1173b1ceabcc7e792599e23419dc3398",
    "signature": "0x54210b4dc0bf56fb57b4293a7bbf9742c1c0851cd847c151d04669847dbb718f3c773dfc48890f9d3d382ebd288e77facd74d1f6d8e5afd495d4931f8f6740741b",
    "signer": "0xa3C91a44f620f0b95468bEC359f89edb95AE3cdC",
    "userId": "904405512"
  }
}