{
  "manageEntity": {
    "action": "Save",
    "entityId": "186699942",
    "entityType": "Track",
    "nonce": "0x10347be765a7649336d9a6117198e744fd03b91099bb0458997fb088349cd87b",
    "signature": "0x092e0a58039b9f6efa5bd0bf90e1424b38f6d797e27fbf09fbc3b51f815488e058089ac73f6bd4cf4c92e24d0d62ace313f7de032f9bb298c0c33a1da007d5e51b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}