{
  "manageEntity": {
    "action": "Save",
    "entityId": "367611156",
    "entityType": "Track",
    "nonce": "0xcc9972b0278cc081598c86780d0c4edf60f5c5e3007b3f09d32845398aef2cdd",
    "signature": "0xc949a8dc88814d6b7192cf180ee9dc4fbcb0e16b80754ef82279136b58513691292a1a3a523f02b0a3711040d787814168ce473aa929d835347e277db8abdd741c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}