{
  "manageEntity": {
    "action": "Save",
    "entityId": "1483957896",
    "entityType": "Track",
    "nonce": "0xf1ef3b0bc5198e3f2c41bc53373782b16306171f4174be2ba32866eb227aacd5",
    "signature": "0xef26c60ea01841ef6b5fc467eed1d4ca8c5bd9289234d5c37d645a1297aa72657dbfcec711b155e1f05dd27389f68bf48b2a5abb2f78497f88b0fa4f69ee9ce31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}