{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370123679",
    "entityType": "Track",
    "nonce": "0x666699da943ce3d81bd72bbd36c4ee473b678aae93008e26e52e4d13ed90c1a1",
    "signature": "0xc0c84b8c2c11c1bb0fddb1ea339ce69f1891a89a29817c6f590272cd8235ccc9731edabf182300393ee30b64c1a7f9d8841b1f92229014118ca17b905f023b4e1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}