{
  "manageEntity": {
    "action": "Save",
    "entityId": "958131",
    "entityType": "Track",
    "nonce": "0x0049c0229384c1efcbf23cc5ed3666c5f15f8f08ca2a6bb9685f7cb6901c0da4",
    "signature": "0x632be6b72073b06c50594c7c6e0fb0c3fab22e81aa96d49c2621490154d52ea74fcccd320e5ead89253a33defe4ed84ef0d3d998b58c4eee6027f174139946c61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}