{
  "manageEntity": {
    "action": "Save",
    "entityId": "464183707",
    "entityType": "Track",
    "nonce": "1793004717100733401",
    "signature": "0x6d003cfa34b06822bc187366a48be2a2ca0c94d051ef24c70eefa38103cca4fe481db344d13638cfd8c07a103fcc95ca0308099b19defbe1dd721027d0bbdf811b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}