{
  "manageEntity": {
    "action": "Save",
    "entityId": "292100231",
    "entityType": "Track",
    "nonce": "0x8ac672a3fffde48a2ceef7014e527aa5962cb179bdaf323c1548c1cc4b6d9279",
    "signature": "0x2d4976b3823f1850df56a0c6fbd399c4bd7b78d550195352e4d4433bb1d0cb4723004a775e4b8cd955a2ca1557a93658d3fcb3fd4f9632ea833eb4c7742b5f451b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}