{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247765801",
    "entityType": "Track",
    "nonce": "0xe481399416e16a85dadcc1210af119504e55d70a31214c9cc7c1200ee9938832",
    "signature": "0xd8c215639ae6e494b495494e3cc372f577a56983a87199fa8df8a66d25ff084654ebb2173784f1a52490516a8306f220099421447b038962acd8d4ea2ea9f7431c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}