{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461396807",
    "entityType": "Track",
    "nonce": "0x6488e2c940e9153a46725e04d6c3edc16b8cb6e5d17bd08f05635cd633e103d1",
    "signature": "0xe48a8ecfc59b6882fbeda17a37d542703b7573d4866262c89e25e265863942077e49058eecb0ecefbb96ee1b61c0131d44ef5ddc5b054243a8f2d64e5f64dd6b1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}