{
  "manageEntity": {
    "action": "Save",
    "entityId": "1871845176",
    "entityType": "Track",
    "nonce": "0x0bf7fac7a814da7e584d17ff4a8026b0967e0d6fb13da0002a8a79001deab19c",
    "signature": "0x3c2f885dff72637bb96c5890f92eb46be5f61d76e0f34c835c504cec56d9f24f46b27cb8bb001e61f94767d03061c98df8092d3fd0a8ad59bbb76a40e84bf5681b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}