{
  "manageEntity": {
    "action": "Save",
    "entityId": "296916377",
    "entityType": "Track",
    "nonce": "0xbab1aefd9077f348599e4460493710b1b2e51000be1757e3e9ff4d0ca25db93d",
    "signature": "0x4c6c7a80da500779fc16e891d304a35dd4423c25c6fc328356e5f7caf3cde45b3eb2272d63a12be99d3c95bc670804cdcac6496b76a78dc1acb81e7c9489105a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}