{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400600465",
    "entityType": "User",
    "nonce": "0x97aaae582ee7891c4fb378eb18244a0444900aefe57e95f184cae1cc9a84a453",
    "signature": "0x2198306ced3af30f04311f4ba21d342c768bd59d0bde35ecb6e53265513e464824dd89bd4403c24511664caef13ba2d161801d527ac0e234e35479bbc682a0e51c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}