{
  "manageEntity": {
    "action": "Save",
    "entityId": "1665197238",
    "entityType": "Track",
    "nonce": "0x8a7d3d0ebcca2404d2dfb68662edf52520ece30bf3ea7c6801990b645408edd3",
    "signature": "0x658dc124d53f161d7d25b8150cb67f4a3805ea1dea39f423101495b69c04522431b3e7b322994165061648d49f7be768154d2abb44f1fd673fee3f7eefabeff21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}