{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987192499",
    "entityType": "Track",
    "nonce": "0xab1d82fa7b55994a10aba6dc50fe57fd306955b2dfbcd2ad2a567c11e18d4a73",
    "signature": "0x6229fd7c53ad1517c3ef4341991e366a4090917eac037094ab03fc56834c7e2b2caface91fb91ed35a946cc43de7014bea7885875493bfd7953d14c7310767061b",
    "signer": "0xAD107a7f1cB5918cCa4fa4556Db5395B94A41710",
    "userId": "928659794"
  }
}