{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893496263",
    "entityType": "Track",
    "nonce": "0x9f41544f69422122e0b5d1a0bcc1abcaeeb12d4876b75151b5f025a1ad751e2d",
    "signature": "0xa59bf822013aa1a8cce768ae8ab6a06a4fdecb43242d78a40a1c2aa4b3d12cd723c5175da54756ecbf18978b804c079a054d0491d6758b5efd1ae26faa4084c61c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}