{
  "manageEntity": {
    "action": "Save",
    "entityId": "466617294",
    "entityType": "Track",
    "nonce": "0x0da9aec349e4a8e2debb329239889eb8a0b95d5dd289dca165c6b4c49c9fa613",
    "signature": "0x608bb9406016be9793d0460ba0bfaf0e31672c5f27358fd6a39fc5f0d77f8af729ddf9c4381dc4088526cbb0e4239fed2cda376c580a7d7ff6a0f52b01366a171b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}