{
  "manageEntity": {
    "action": "Save",
    "entityId": "1329147658",
    "entityType": "Track",
    "nonce": "1786671983974704504",
    "signature": "0x327147b78bee7d4f71b3eb5256f4324e148b7bc9347f533df2106193b82c1bc974765a9f96abeaad293543e2e306b54f4caddb18f10275e2a1fa0863235edb231b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}