{
  "manageEntity": {
    "action": "Save",
    "entityId": "264033338",
    "entityType": "Track",
    "nonce": "0x9f06915149ab6a96bae954fae37517e7ba05cda3de043507f17fa12a7dc2ebcd",
    "signature": "0xa01996628287cbd61d870981ac28c68aab628df7474dd407db9668955229ad9935769c8294f2c6fb9a1e3f32244d7d2d7ce275f63d96d203dba3b1ab05f0ebf11c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}