{
  "manageEntity": {
    "action": "Save",
    "entityId": "121440670",
    "entityType": "Track",
    "nonce": "0xf54b277250423cbb329bee179f29835aa643fbe0d0c1b4f1ca25519024285c7d",
    "signature": "0x0c95f4d3699d921cdc97b84e23bb4220b52eb31ea0e548e6204135d93a7a6eec61a1fb0d1c7129e1db7e3667e0419552ad9cac160f1081115f77502a44cd6d151b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}