{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048773202",
    "entityType": "Track",
    "nonce": "0xa399df5be7c8d574d611769e97c25313b754ff6e31ed8187693ec573c12aad13",
    "signature": "0x9e16f3d90cf79e7916d151ea604d1566e4ae59c4dba8f8d214ebe467ae0b3acd098103ae189f416f230e279bedaab2149ea599c6ce383a72347a185207c1c1fb1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}