{
  "manageEntity": {
    "action": "Save",
    "entityId": "470336011",
    "entityType": "Track",
    "nonce": "0x1b6f729875e9ecd8b53860998132b159334a3d0dde36758b887d4086f929ca35",
    "signature": "0xea13680288d09c5e965dbc32ec59bcbf78149cf6f12bce422fe872e030fd7e657a527648253dac0cb0a29c1a955889b2b6540e89fb3636b04c4d127913ac427a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}