{
  "manageEntity": {
    "action": "Save",
    "entityId": "561868894",
    "entityType": "Track",
    "nonce": "0x002965e8cd7c27827c292ac83fd9b05196af206f165280d74d274f6c2aa128ec",
    "signature": "0x5ae5a377e223e84e031672503d9696a8dbdc48af8be95018421d51d0fbce147000b588b8b4bf1efc0a56ead9995b160c1916c86be9083faeae4678fae5ba66a31c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}