{
  "manageEntity": {
    "action": "Save",
    "entityId": "1234547779",
    "entityType": "Track",
    "nonce": "0x020e0db09cd935cdad7e943e0e76e159e0459c0e5034b8e70967d8a8c3d6a5a9",
    "signature": "0x60e47eea4c04ad29bdcc10219c289a5ddd904599ab47a3e1a1b7bf651dee04df34dd25bf677c7d76241d8d460e3cf33d2bf6c28235b4d0e4f9904ac2c131ea8a1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}